Motorbike fork oil?

[FluffyChicken]

Honestly just spend the pennies and get half a litre (500cc aka ml) only £6 or so, so whatever near you and it'll last for ages.
You'll need the fork grease as well to grease everything up, seals especially.

i'd take anything right now if it was the right weight. i don't have a near by LBS, so I was hoping to save some travel time as well as some money.

Stick some custard in some water then it'll slow them down
Though it'll have the odd effect of locking out on hard bumps and only working on gentle stuff if you get the mix right.

 

[andrewl]

Honestly just spend the pennies and get half a litre (500cc aka ml) only £6 or so, so whatever near you and it'll last for ages.
You'll need the fork grease as well to grease everything up, seals especially.

i'd take anything right now if it was the right weight. i don't have a near by LBS, so I was hoping to save some travel time as well as some money.

Redline suspension fluids work a treat and you can mix the different weights to get the one you want. With Bombers its worthwhile playing around with different weights and volumes to suit your riding style too.

 

[FluffyChicken]

Honestly just spend the pennies and get half a litre (500cc aka ml) only £6 or so, so whatever near you and it'll last for ages.
You'll need the fork grease as well to grease everything up, seals especially.

i'd take anything right now if it was the right weight. i don't have a near by LBS, so I was hoping to save some travel time as well as some money.

Redline suspension fluids work a treat and you can mix the different weights to get the one you want. With Bombers its worthwhile playing around with different weights and volumes to suit your riding style too.

They're Superfly's Air/Oil not normal Bomber Spring/Oil Air is in the bottom of the forks with the 7cc of lubricant.
Altering the 50cc volume in the stanchions shouldn't do anything?

 

[andrewl]

They're Superfly's Air/Oil not normal Bomber Spring/Oil Air is in the bottom of the forks with the 7cc of lubricant.
Altering the 50cc volume in the stanchions shouldn't do anything?

My understanding is that the air still ends up in the top as thats where the volume change is, and altering the oil level alters the air volume and hence the linearity of the spring.

I'll have to pull a leaky one apart to check though.

 

[FMJ]

i'd take anything right now if it was the right weight. i don't have a near by LBS, so I was hoping to save some travel time as well as some money.

-go to your nearest Canadian Tire
-grab a 4 litre jug of Shell Dextron II
-pour enough of it in a coffee can (the plastic Folger's ones are nice) to completely submerge the shock
-dissasemble and clean shock
-pre-assemble shock so it's together, but the top isn't screwed together
-submerge shock in ATF in the coffee can
-cycle shock to purge the air, keeping shock tilted up slightly
-screw shock together while still submerged
-remove shock from fluid, clean, install spring, bolt on bike
-total expense: $15 * plus the cost of whatever the wife wants you to get at CTC
-repeat steps in 2 weeks when it sucks air in oil chamber again.

It's an AMP shock. They're the most primitive shocks made (they do work a bit better if you mod the shock shaft, though). Arguing over which super oil with ti-moly-cheddar additives is better is moot in this instance. Half the travel is undamped side flex to begin with, and the things gonna bleed off some oil the first ride and start hissing again, anyway.

 

[RockiMtn]

hmmm… only can seem to find Mobil Dexron-VI or D/M at Canadian Tire online.

http://www.canadiantire.ca/AST/browse/4 ... ?locale=en

http://www.canadiantire.ca/AST/browse/4 ... ?locale=en

Will these work? I'll have to take a walk over to CT after work.

 

[drystonepaul]

i take it thats how you would make adjustments for you weight? on the earlier Boxxers, there does not seem to be a adjustment knob of any kind, you must have to do it internally?

Am I right in thinking that those Boxxers use coil springs? In which case you'll need to use different springs to accommodate different rider weights or riding styles.

The viscosity or weight of the oil will only really effect damping characteristics.

In air/oil sprung forks like Mag 21s you can make adjustments for rider weight by playing around with the volume or amount of oil in the fork. As a general rule you'll need slightly more oil for heavier riders.
If you can get hold of the manual you may be able to find some info or even a chart of oil volumes or oil heights. Raising or lowering the oil level by even a few millimetres can make a significant difference to the 'spring' of the fork.

 

[FluffyChicken]

They're Superfly's Air/Oil not normal Bomber Spring/Oil Air is in the bottom of the forks with the 7cc of lubricant.
Altering the 50cc volume in the stanchions shouldn't do anything?

My understanding is that the air still ends up in the top as thats where the volume change is, and altering the oil level alters the air volume and hence the linearity of the spring.

I'll have to pull a leaky one apart to check though.

I understand that as I know MAG21's very well.

But no, the Air chamber (in z2 superflys) is apparently the bottom and is specifically kept separate from the damping section. In fact you are suppose to release the air if it ever get into the top chamber and then find out why it got there. Also if air got to the top oil would certainly get in to the bottom under pressure. Plus specific to these air/oil, you measure in cc, not oil height.
Think of it this way, since the oil in the stanchion is the damping oil and goes through the damping bits (static on the centre rod), then there is no oil to bunch up to enable the air in there to compress.
It's all separate, unlike MAGs where the oil is in the top and lower part and the end of the the legs is the damper.

I posted the internal here http://www.retrobike.co.uk/forum/viewtopic.php?t=107191

Of course if anyone knows better please explain

 

[FMJ]

hmmm… only can seem to find Mobil Dexron-VI or D/M at Canadian Tire online.

http://www.canadiantire.ca/AST/browse/4 ... ?locale=en

http://www.canadiantire.ca/AST/browse/4 ... ?locale=en

Will these work? I'll have to take a walk over to CT after work.

Either will work. Hell, the Motomaster Dextron III stuff will work. It all meets the mfgr's standards. It's a simple single orifice shock. There's no wave washers and no bypass valves to gum up. Pretty much any half decent lightweight hydraulic oil with reasonable shear qualities will work in it.

*EDIT* Stratos recommends ATF in their air/oil and air/oil/coil shocks, and they are far more complicated designs with their adjustable compression/rebound and blowoff circuits.

 

[RockiMtn]

got the ATF fluid from CdnTire and serviced it this w/e. commuted to work with it today and the Amplifier rear is much better. the oil that came out of it was muddy grey colour. the new ATF is a bright red. what a difference Thanks FMJ!

Decided to forego replacing the seals this time around to see how it fairs with just an oil change. Gotta service the from fork shock now. probably as nasty as the rear.

now if I could only find some stink'n 7.5 wt fork oil for the Marz Superfly. It's proven difficult to find, especially at a price that isn't ridiculously over priced!